linux/arch/mn10300/unit-asb2305/leds.c
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   1/* ASB2305 Peripheral 7-segment LEDs x4 support
   2 *
   3 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public Licence
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the Licence, or (at your option) any later version.
  10 */
  11#include <linux/kernel.h>
  12#include <linux/param.h>
  13#include <linux/init.h>
  14#include <asm/io.h>
  15#include <asm/processor.h>
  16#include <asm/cpu/intctl-regs.h>
  17#include <asm/cpu/rtc-regs.h>
  18#include <asm/unit/leds.h>
  19
  20static const u8 asb2305_led_hex_tbl[16] = {
  21        0x80, 0xf2, 0x48, 0x60, 0x32, 0x24, 0x04, 0xf0,
  22        0x00, 0x20, 0x10, 0x06, 0x8c, 0x42, 0x0c, 0x1c
  23};
  24
  25static const u32 asb2305_led_chase_tbl[6] = {
  26        ~0x02020202,    /* top          - segA */
  27        ~0x04040404,    /* right top    - segB */
  28        ~0x08080808,    /* right bottom - segC */
  29        ~0x10101010,    /* bottom       - segD */
  30        ~0x20202020,    /* left bottom  - segE */
  31        ~0x40404040,    /* left top     - segF */
  32};
  33
  34static unsigned asb2305_led_chase;
  35
  36void peripheral_leds7x4_display_dec(unsigned int val, unsigned int points)
  37{
  38        u32 leds;
  39
  40        leds = asb2305_led_hex_tbl[(val/1000) % 10];
  41        leds <<= 8;
  42        leds |= asb2305_led_hex_tbl[(val/100) % 10];
  43        leds <<= 8;
  44        leds |= asb2305_led_hex_tbl[(val/10) % 10];
  45        leds <<= 8;
  46        leds |= asb2305_led_hex_tbl[val % 10];
  47        leds |= points^0x01010101;
  48
  49        ASB2305_7SEGLEDS = leds;
  50}
  51
  52void peripheral_leds7x4_display_hex(unsigned int val, unsigned int points)
  53{
  54        u32 leds;
  55
  56        leds = asb2305_led_hex_tbl[(val/1000) % 10];
  57        leds <<= 8;
  58        leds |= asb2305_led_hex_tbl[(val/100) % 10];
  59        leds <<= 8;
  60        leds |= asb2305_led_hex_tbl[(val/10) % 10];
  61        leds <<= 8;
  62        leds |= asb2305_led_hex_tbl[val % 10];
  63        leds |= points^0x01010101;
  64
  65        ASB2305_7SEGLEDS = leds;
  66}
  67
  68void peripheral_leds_display_exception(enum exception_code code)
  69{
  70        u32 leds;
  71
  72        leds = asb2305_led_hex_tbl[(code/0x100) % 0x10];
  73        leds <<= 8;
  74        leds |= asb2305_led_hex_tbl[(code/0x10) % 0x10];
  75        leds <<= 8;
  76        leds |= asb2305_led_hex_tbl[code % 0x10];
  77        leds |= 0x6d010101;
  78
  79        ASB2305_7SEGLEDS = leds;
  80}
  81
  82void peripheral_leds7x4_display_minssecs(unsigned int time, unsigned int points)
  83{
  84        u32 leds;
  85
  86        leds = asb2305_led_hex_tbl[(time/600) % 6];
  87        leds <<= 8;
  88        leds |= asb2305_led_hex_tbl[(time/60) % 10];
  89        leds <<= 8;
  90        leds |= asb2305_led_hex_tbl[(time/10) % 6];
  91        leds <<= 8;
  92        leds |= asb2305_led_hex_tbl[time % 10];
  93        leds |= points^0x01010101;
  94
  95        ASB2305_7SEGLEDS = leds;
  96}
  97
  98void peripheral_leds7x4_display_rtc(void)
  99{
 100        unsigned int clock;
 101        u8 mins, secs;
 102
 103        mins = RTMCR;
 104        secs = RTSCR;
 105
 106        clock = ((mins & 0xf0) >> 4);
 107        clock *= 10;
 108        clock += (mins & 0x0f);
 109        clock *= 6;
 110
 111        clock += ((secs & 0xf0) >> 4);
 112        clock *= 10;
 113        clock += (secs & 0x0f);
 114
 115        peripheral_leds7x4_display_minssecs(clock, 0);
 116}
 117
 118void peripheral_leds_led_chase(void)
 119{
 120        ASB2305_7SEGLEDS = asb2305_led_chase_tbl[asb2305_led_chase];
 121        asb2305_led_chase++;
 122        if (asb2305_led_chase >= 6)
 123                asb2305_led_chase = 0;
 124}
 125